Bicolor Blenny
Ecsenius bicolor
Bicolor Blenny (Ecsenius bicolor) is a marine species with an adult-size reference of about 10 cm. It needs at least 100 litres and one individual, with its social and territorial profile taken into account.
Wassertemperatur
24 - 28 °C
pH-Wert
8.1 - 8.4
Wassertyp
Meerwasser
Tankfüllstand
Unten und in der Mitte
Erwachsenengröße
10 cm
Mindesttankvolumen
>= 100 L
Mindestgruppe
>= 1
KH
4 - 6 dKH
Artbeschreibung
Geographical Origin and Habitat: A marine species; the enclosure should provide stability, oxygenation, space and shelter consistent with its behaviour without turning one habitat description into a mandatory recipe.
Taxonomy and Morphology: The accepted scientific name is Ecsenius bicolor; the verified classification records genus Ecsenius, family Blenniidae, subfamily Salariinae, order Blenniiformes. Historical names remain searchable as synonyms rather than separate species.
Social Behavior: Bicolor Blenny is normally kept as a single individual and does not require conspecifics. The minimum reference is one individual; sex, maturity and available space can require a more conservative composition. Observe access to food, resting behaviour, chasing and use of shelter. Isolation, persistent competition or aggression means the number, composition or environment needs to be corrected.
Coloration and Sexual Dimorphism: Colour and shape can vary with age, sex, physiological state and environmental conditions. Identification and sexing require recognized species-level characters; one appearance or photograph is not enough.
Pflege, Zucht und Mitbewohner
Aquarium Setup: Bicolor Blenny needs an aquarium of at least 100 litres, sized for adult body size and a minimum group of one individual. Filtration, shelter and swimming room must match the species and the actual number kept. Volume alone does not make an enclosure suitable: tank shape and length, usable area, oxygenation and the ability to separate territories must reflect adult behaviour.
Diet and Feeding: The recorded diet is omnivorous. Offer appropriately sized foods varied within that category, and adjust quantity and frequency from actual intake, body condition and leftovers. One food or a fixed schedule is not suitable for every age and situation.
Water Quality: Maintain stable, well-oxygenated water appropriate to a marine species; the card's reference values are 24–28 °C, pH 8.1–8.4. Verify conditions with reliable tests and size maintenance and filtration to the actual load. Ranges are not automatic thresholds for treatment or rapid chemical correction.
Compatibility and Cohabitation: The cohabitation profile is reef-safe with caution, with a generally territorial temperament. Keep at least one individual; tankmates, stocking density and decor must allow escape, rest and feeding without excessive competition. Watch interactions especially during feeding, maturity and breeding. Persistent chasing, injury or exclusion from food requires a change in stocking or layout, or separation of the animals.
Aquarium Breeding: The recorded reproductive profile is “oviparity”. Breeding should be attempted only with healthy adults, separation capacity and a plan for eggs or young. Do not treat unverified triggers, sex ratios or hatch times as universal for this species.
Risks and Diseases: Use a secure cover and close escape gaps. Prevent problems through quarantine of new arrivals, stable water, appropriate feeding and daily observation. Similar signs can have different causes, so check parameters, history and diagnosis before medication. Follow the product label and qualified aquatic-veterinary advice; there is no universal reduced dose for a species or family.
Geografische Herkunft und Verbreitung
A marine species; the enclosure should provide stability, oxygenation, space and shelter consistent with its behaviour without turning one habitat description into a mandatory recipe.
Ursprung
Tropische Ozeane und Riffe
Fischprofil
- Temperament
- Territorial
- Bicolor Blenny has a generally territorial temperament. Insufficient space, an unsuitable social ratio or incompatible tankmates can substantially change observed behaviour.
- Diät
- Omnivore
- The Ecsenius bicolor is primarily an omnivore with a strong preference for marine microalgae. They will actively graze on rocks, keeping nuisance algae growth under control. Their diet must be heavily supplemented with high-quality spirulina flakes, algae wafers, and occasional meaty items like mysis shrimp. A varied diet ensures they receive the necessary vitamins for vibrant coloration and long-term health.
- Lebenserwartung
- 3-6 years
- Erwachsenengröße
- 10 cm
- Geschlechterverhältnis
- Solitary
- Bicolor Blenny is normally kept as a single individual and does not require conspecifics. The reference minimum is one individual and must not be read as permission to overcrowd the aquarium.
- Fütterungsfrequenz
- Twice daily
- Because they have small stomachs and are constant grazers, they benefit from being fed one to two times daily. Providing small, frequent meals mimics their natural foraging behavior on the reef. An established aquarium with plenty of live rock will allow them to snack on algae between scheduled feedings. Ensuring they have a continuous food source prevents undesirable nipping at corals.
- Bioload
- Medium
- The Ecsenius bicolor adds a very low bioload to the aquarium system, making it an excellent choice for smaller tanks. Their small size and efficient metabolism ensure that they do not heavily pollute the water. Routine maintenance and a standard protein skimmer are more than adequate to handle their waste. This makes them highly suitable for delicate reef environments where water purity is paramount.
- Fluss
- Strong
- Ecsenius bicolor needs brisk, oxygen-rich circulation, with the strongest return flow spread through open water rather than aimed continuously at one refuge. Nano-reef or community aquarium of minimum 100 liters (25 gallons). Many porous live rocks with natural holes for hiding are vital. Keep solid cover available so the fish can leave the fastest water whenever it chooses.
- Sprungrisiko
- Yes
- Blennies are known to be significant jump risks, especially when first introduced or if they feel threatened. They can easily propel themselves out of an open-topped aquarium. A well-fitted lid or a custom mesh screen is absolutely vital to keeping this fish safely inside the tank. Many aquarists have unfortunately lost these charismatic fish to carpet surfing incidents.
- Reproduktion
- Oviparous
- The Ecsenius bicolor is a demersal spawner, laying their eggs in small crevices or empty shells. The male will diligently guard and fan the nest until the eggs hatch into pelagic larvae. While spawning is frequently observed in home aquariums, successfully raising the tiny fry is incredibly difficult. It requires specialized microscopic live foods and dedicated rearing systems.
- Kompatibilität & Tankkameraden
- Reef safe with caution
- The cohabitation profile is reef-safe with caution, with a generally territorial temperament. Keep at least one individual; tankmates, stocking density and decor must allow escape, rest and feeding without excessive competition. Watch interactions especially during feeding, maturity and breeding. Persistent chasing, injury or exclusion from food requires a change in stocking or layout, or separation of the animals.
- Tankfüllstand
- Middle/Bottom
- This fish is predominantly a bottom to mid-level dweller, spending most of its time perched on live rock. They find a favorite crevice or barnacle shell and reverse into it, leaving only their curious head exposed. While they occasionally dart into the water column to catch food, they quickly return to their rocky perches. Their comical perching behavior is a defining characteristic of the species.
Wissenschaftliche Modelle & Parameter
FishBase
Zugang zu den offiziellen wissenschaftlichen Daten der Art
FishBase v25.04Daten synchronisiert am: 15.06.2026
- Trophäenniveau
- 2 ± 0 se
- Belastbarkeit
- Hoch (weniger als 15 Monate)
- Phylogenetische Einzigartigkeit (PD50)
- 0.5
- Bayessche Längen-Gewichts-Beziehung
- a = 0.00851, b = 2.86
- AnfälligkeitGeringe Anfälligkeit (10 / 100)
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